{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["place of birth", "nationality", "country capital", "children"], "input": " Johnnie Johnson , the blues and early rock 'n' roll pianist who played on many of Chuck Berry 's early hits and performed with Mr. Berry for more than 20 years , died yesterday at home in St. Louis , according to a statement from his publicist , Margo Lewis . "}
{"place of birth": [], "nationality": [], "country capital": [], "children": []}